Friday Morning And I'm Feeling Dizzy

Today, I witnessed a milestone in American healthcare. I heard someone other than Wilford Brimley seriously refer to dya-beat-eez as dya-beat-iss. And what's more, this person was a registered nurse. This, I realize, just raises more questions. Are nurses allowed to mispronounce diseases? Or has Wilford been right all this time? And who names their kid Wilford?